With the arrival of the new AHDB Nutrient Management Guide (RB209) and its revised values for P & K offtakes, and the inclusion of more crops, we have updated our P & K Calculator accordingly.

The P & K Calculator is a free tool for farmers and crop nutrition advisors in England, Wales and N Ireland. It makes two calculations; nutrient offtake and nutrient deficiency correction. It can be used via our website or downloaded as an App.

P & K Calculator App for the Field

The Calculator App has been designed so that once it is accessed, it can continue to be used even when there is no internet connection. Most devices (phones, tablets or computers) will store the calculator so it can be used in the field where there may not be any internet connection.

On the PDA website we provide instructions for many devices explaining how to set up the calculator for easy offline use.

Updating your P & K Calculator App

Now that we have updated the data in the calculator it is important to ensure you are using the latest version. Make sure there is an internet connection and then load the calculator in the usual way. This should trigger your device to collect the latest data from us (you may need to refresh the calculator to make sure you have the latest version).

If the copyright at the bottom of the calculator is dated 2017 then the refresh has been successful.

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